View Sample Alloy Digest Data Sheet (PDF)Since 1952, Alloy Digest has been the leading reference for materials property data on metals and alloys used throughout the world. Featuring graphs, charts and tables, these sheets give facts and figures on composition or characterization, physical and mechanical properties, heat treatment, and machinability.UHB TRI-Z is a high-carbon high-chromium tool steel with an absolute minimum of nonmettalic inclusions. It is an air hardening steel having high resistance to abrasive wear. It is recommended for intricate dies where maximum accuracy in heat treatment and high production are essential. It is also very suitable for working rolls in Sendzimir Cold Rolling Mills (which is implied by the letter Z).